[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c.
[   58.879445][   T27] audit: type=1800 audit(1586863588.118:25): pid=7613 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2447 res=0
[   58.909182][   T27] audit: type=1800 audit(1586863588.118:26): pid=7613 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0
[   58.944624][   T27] audit: type=1800 audit(1586863588.118:27): pid=7613 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0
[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c.
[....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c.

Debian GNU/Linux 7 syzkaller ttyS0

Warning: Permanently added '10.128.0.63' (ECDSA) to the list of known hosts.
2020/04/14 11:26:39 fuzzer started
2020/04/14 11:26:40 dialing manager at 10.128.0.105:44371
2020/04/14 11:26:43 syscalls: 2957
2020/04/14 11:26:43 code coverage: enabled
2020/04/14 11:26:43 comparison tracing: enabled
2020/04/14 11:26:43 extra coverage: enabled
2020/04/14 11:26:43 setuid sandbox: enabled
2020/04/14 11:26:43 namespace sandbox: enabled
2020/04/14 11:26:43 Android sandbox: /sys/fs/selinux/policy does not exist
2020/04/14 11:26:43 fault injection: enabled
2020/04/14 11:26:43 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled
2020/04/14 11:26:43 net packet injection: enabled
2020/04/14 11:26:43 net device setup: enabled
2020/04/14 11:26:43 concurrency sanitizer: enabled
2020/04/14 11:26:43 devlink PCI setup: PCI device 0000:00:10.0 is not available
2020/04/14 11:26:43 USB emulation: /dev/raw-gadget does not exist
syzkaller login: [   75.090616][ T7777] KCSAN: could not find function: '_find_next_bit'
2020/04/14 11:26:44 adding functions to KCSAN blacklist: '__ext4_new_inode' 'find_get_pages_range_tag' 'n_tty_receive_buf_common' 'do_syslog' 'ktime_get_real_seconds' '_find_next_bit' 'ep_poll' 'add_timer' 
[   89.380074][    T0] ==================================================================
[   89.388294][    T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_next_event
[   89.396849][    T0] 
[   89.399167][    T0] write to 0xffffffff85d056d0 of 4 bytes by task 0 on cpu 0:
[   89.406552][    T0]  tick_nohz_idle_stop_tick+0x52c/0x680
[   89.412128][    T0]  do_idle+0x1ad/0x290
[   89.416191][    T0]  cpu_startup_entry+0x14/0x20
[   89.420952][    T0]  rest_init+0xe4/0xeb
[   89.425016][    T0]  arch_call_rest_init+0x13/0x2b
[   89.430110][    T0]  start_kernel+0xcc2/0xceb
[   89.434609][    T0]  secondary_startup_64+0xa4/0xb0
[   89.439720][    T0] 
[   89.442038][    T0] read to 0xffffffff85d056d0 of 4 bytes by task 0 on cpu 1:
[   89.449593][    T0]  tick_nohz_next_event+0x192/0x350
[   89.454794][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   89.460355][    T0]  do_idle+0x1ad/0x290
[   89.464640][    T0]  cpu_startup_entry+0x14/0x20
[   89.469504][    T0]  start_secondary+0x164/0x1b0
[   89.474252][    T0]  secondary_startup_64+0xa4/0xb0
[   89.479269][    T0] 
[   89.481578][    T0] Reported by Kernel Concurrency Sanitizer on:
[   89.487715][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc1-syzkaller #0
[   89.495598][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   89.505634][    T0] ==================================================================
[   89.513752][    T0] Kernel panic - not syncing: panic_on_warn set ...
[   89.520416][    T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.6.0-rc1-syzkaller #0
[   89.528331][    T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   89.538369][    T0] Call Trace:
[   89.541648][    T0]  dump_stack+0x11d/0x187
[   89.545970][    T0]  panic+0x210/0x640
[   89.549866][    T0]  ? vprintk_func+0x89/0x13a
[   89.554460][    T0]  kcsan_report.cold+0xc/0xf
[   89.559038][    T0]  kcsan_setup_watchpoint+0x3fb/0x440
[   89.564399][    T0]  tick_nohz_next_event+0x192/0x350
[   89.569584][    T0]  tick_nohz_idle_stop_tick+0x3b9/0x680
[   89.575108][    T0]  ? ktime_get+0x1c9/0x210
[   89.579517][    T0]  ? debug_smp_processor_id+0x3f/0x129
[   89.584960][    T0]  do_idle+0x1ad/0x290
[   89.589014][    T0]  cpu_startup_entry+0x14/0x20
[   89.593762][    T0]  start_secondary+0x164/0x1b0
[   89.598509][    T0]  secondary_startup_64+0xa4/0xb0
[   89.604931][    T0] Kernel Offset: disabled
[   89.609260][    T0] Rebooting in 86400 seconds..